I am very capable of writing (good to great) compelling, marketing copy (with all copy thoroughly proofed)… and able to do research, learning (in detail) about your issues/products/services.
I have many active samples available (all available for review with the consent of my customers). What type of "relevant writing samples" are you looking for?
If you also need link and web submission, for a sample, type my name into Google: David Breth